21. Vergence is also denoted according to its direction : horizontal vergence, vertical vergence, and torsional vergence ( cyclovergence ). 22. Horizontal vergence is further distinguished into convergence ( also : positive vergence ) or divergence ( also : negative vergence ). 23. Horizontal vergence is further distinguished into convergence ( also : positive vergence ) or divergence ( also : negative vergence ). 24. Horizontal vergence is further distinguished into convergence ( also : positive vergence ) or divergence ( also : negative vergence ). 25. Some binocular microscopes are designed so that the vergence of the eyes is correct for a 6-meter viewing distance. 26. Landward vergence of thrust folds, primarily frontal fold vergence is the most ubiquitous tectonic event happens at the prism bottom. 27. Landward vergence of thrust folds, primarily frontal fold vergence is the most ubiquitous tectonic event happens at the prism bottom. 28. As opposed to the 500?/ s velocity of saccade movements, vergence movements are far slower, around 25?/ s. 29. The relation between the position of the two eyes, version and vergence is described by Hering's law of visual direction. 30. "' Fusional vergence "'is the movement of both eyes that enables the fusion of monocular images producing binocular vision.
